Under these circumstances, it is somewhat surprising to find the deliberate conclusions of these careful investigators set aside in the following brief passage:-- "This Bornean species (_C. Schlegelii_) was, in fact, originally described as a new species of Gavial; but the nasal bones, as in the fossil from Sheppey, figured in t. ii. 15, extend to the hinder border of the external nostril."--_Owen_, _Fossil Reptilia of the London Clay, Crocodilia_, p. 15: 1850. Müller and Schlegel give remarkably clear and beautiful figures of the skull of their Gavial; and these show at once that the nasal bones do not "reach the hinder border of the external nostril," but meet the premaxillaries at a point very distant from that border, viz. opposite the ninth tooth. Even did the nasal bones reach the posterior boundary of the nostril, such a character would not outweigh those derived from the relations and number of the teeth, the structure and extent of the mandibular symphysis, and the disposition of the dermal scutes,--all of which are so clearly and definitely set forth by Müller and Schlegel, that it seems difficult to understand how any one who had consulted the original memoir could have overlooked them. It was possible, however, that Müller and Schlegel, notwithstanding their great opportunities, might have erred in their statements; and I therefore gladly seized the opportunity of testing their description by comparing it with an authentic skull of the species in question, from New Guinea, in the collection of the British Museum. I have found the statement of Müller and Schlegel minutely accurate in almost all points; and there cannot be the slightest doubt, not only that the Schlegelian crocodile is one of the _Gavialidæ_, but that it forms a distinct generic type in that family, as different from _Gavialis_ as _Caiman_ is from _Jacare_, or _Mecistops_ from _Crocodilus_. * * * * * The following are the most important measurements of the skull of _Rhynchosuchus Schlegelii_ in the British Museum collection:-- Inches. Length from the end of the premaxilla to that of os quadratum 23 Breadth from outer edge of one os quadratum to that of the other 8-3/4 Breadth across the face in front of the orbits 4 " at the 9th tooth 2 " at the 5th tooth 1-1/2 " at the 3rd tooth 1-3/4 " of the beak-like curved process which carries the two anterior teeth 1 Mean width of lower jaw from symphysis to extremity 1-5/8 Length 12 No tooth measures transversely more than 3/16